[3080] Initial PostgreSQL patch

 - patch contributed by David Carlier (thanks!)
 - updated to current master
 - fixed compliation issues
 - written developer's guide (pgsql setup steps)
 - many smaller changes
 - still WIP

configure.ac

@@ -969,6 +969,58 @@ AC_CHECK_HEADER(sys/filio.h)
 # ... and at the shell level, so Makefile.am can take action depending on this.
 AM_CONDITIONAL(HAVE_MYSQL, test "$MYSQL_CONFIG" != "")
 
+pg_config="no"
+AC_ARG_WITH([dhcp-pgsql],
+  AC_HELP_STRING([--with-dhcp-pgsql=PATH],
+    [path to the PostgreSQL 'pg_config' script]),
+    [pg_config="$withval"])
+
+if test "${pg_config}" = "yes" ; then
+    PG_CONFIG="/usr/bin/pg_config"
+elif test "${pg_config}" != "no" ; then
+    PG_CONFIG="${withval}"
+fi
+
+if test "$PG_CONFIG" != "" ; then
+    if test -d "$PG_CONFIG" -o ! -x "$PG_CONFIG" ; then
+        AC_MSG_ERROR([--with-dhcp-pgsql should point to a pg_config program])
+    fi
+
+    PGSQL_CPPFLAGS=`$PG_CONFIG --cppflags`
+    PGSQL_INCLUDEDIR=`$PG_CONFIG --includedir`
+    PGSQL_CPPFLAGS="$PGSQL_CPPFLAGS -I$PGSQL_INCLUDEDIR"
+    PGSQL_LIBS=`$PG_CONFIG --ldflags`
+    PGSQL_LIBS="$PGSQL_LIBS -lpq"
+    PGSQL_VERSION=`$PG_CONFIG --version`
+
+    AC_SUBST(PGSQL_CPPFLAGS)
+    AC_SUBST(PGSQL_LIBS)
+
+    # Check that a simple program using PostgreSQL functions can compile and link.
+    CPPFLAGS_SAVED="$CPPFLAGS"
+    LIBS_SAVED="$LIBS"
+
+    CPPFLAGS="$PGSQL_CPPFLAGS $CPPFLAGS"
+    LIBS="$PGSQL_LIBS $LIBS"
+
+    AC_LINK_IFELSE(
+            [AC_LANG_PROGRAM([#include <libpq-fe.h>],
+                             [PGconn * c = PQconnectdb("dbname = 'postgres'");
+                              PQfinish(c);])],
+            [AC_MSG_RESULT([checking for PostgreSQL headers and library... yes])],
+            [AC_MSG_RESULT([checking for PostgreSQL headers and library... no])
+             AC_MSG_ERROR([Needs PostgreSQL library])]
+    )
+
+    CPPFLAGS=$CPPFLAGS_SAVED
+    LIBS=$LIBS_SAVED
+
+    # Note that PostgreSQL is present in the config.h file
+    AC_DEFINE([HAVE_PGSQL], [1], [PostgreSQL is present])
+fi
+
+# ... and at the shell level, so Makefile.am can take action depending on this.
+AM_CONDITIONAL(HAVE_PGSQL, test "$PG_CONFIG" != "")
 
 # Check for log4cplus
 log4cplus_path="yes"
@@ -1743,6 +1795,26 @@ MySQL:
   MYSQL_CPPFLAGS:  ${MYSQL_CPPFLAGS}
   MYSQL_LIBS:      ${MYSQL_LIBS}
 END
+else
+cat >> config.report << END
+
+MySQL: no
+END
+fi
+
+if test "$PGSQL_CPPFLAGS" != "" ; then
+cat >> config.report << END
+
+PostgreSQL:
+  PGSQL_VERSION:   ${PGSQL_VERSION}
+  PGSQL_CPPFLAGS:  ${PGSQL_CPPFLAGS}
+  PGSQL_LIBS:      ${PGSQL_LIBS}
+END
+else
+cat >> config.report << END
+
+PostgreSQL: no
+END
 fi
 
 if test "$enable_gtest" != "no"; then

src/lib/dhcpsrv/Makefile.am

@@ -7,6 +7,9 @@ AM_CPPFLAGS += $(BOOST_INCLUDES)
 if HAVE_MYSQL
 AM_CPPFLAGS += $(MYSQL_CPPFLAGS)
 endif
+if HAVE_PGSQL
+AM_CPPFLAGS += $(PGSQL_CPPFLAGS)
+endif
 
 AM_CXXFLAGS = $(B10_CXXFLAGS)
 
@@ -54,6 +57,9 @@ libb10_dhcpsrv_la_SOURCES += memfile_lease_mgr.cc memfile_lease_mgr.h
 if HAVE_MYSQL
 libb10_dhcpsrv_la_SOURCES += mysql_lease_mgr.cc mysql_lease_mgr.h
 endif
+if HAVE_PGSQL
+libb10_dhcpsrv_la_SOURCES += pgsql_lease_mgr.cc pgsql_lease_mgr.h
+endif
 libb10_dhcpsrv_la_SOURCES += option_space_container.h
 libb10_dhcpsrv_la_SOURCES += pool.cc pool.h
 libb10_dhcpsrv_la_SOURCES += subnet.cc subnet.h
@@ -77,6 +83,9 @@ libb10_dhcpsrv_la_LDFLAGS  = -no-undefined -version-info 3:0:0
 if HAVE_MYSQL
 libb10_dhcpsrv_la_LDFLAGS += $(MYSQL_LIBS)
 endif
+if HAVE_PGSQL
+libb10_dhcpsrv_la_LDFLAGS += $(PGSQL_LIBS)
+endif
 
 if USE_CLANGPP
 # Disable unused parameter warning caused by some of the
@@ -88,8 +97,8 @@ endif
 EXTRA_DIST = dhcpsrv_messages.mes
 
 # Distribute MySQL schema creation script and backend documentation
-EXTRA_DIST += dhcpdb_create.mysql database_backends.dox libdhcpsrv.dox
-dist_pkgdata_DATA = dhcpdb_create.mysql
+EXTRA_DIST += dhcpdb_create.mysql dhcpdb_create.pgsql database_backends.dox libdhcpsrv.dox
+dist_pkgdata_DATA = dhcpdb_create.mysql dhcpdb_create.pgsql
 
 install-data-local:
 	$(mkinstalldirs) $(DESTDIR)$(dhcp_data_dir)

src/lib/dhcpsrv/database_backends.dox

@@ -121,4 +121,78 @@
   The unit tests are run automatically when "make check" is executed (providing
   that BIND 10 has been build with the \--with-dhcp-mysql switch (see the installation
   section in the <a href="http://bind10.isc.org/docs/bind10-guide.html">BIND 10 Guide</a>).
+
+ @subsection dhcp-pgsql-unittest PostgreSQL unit-tests
+
+  Conceptually, the steps required to run PostgreSQL unit-tests are the same as
+  in MySQL. First, a database called <i>keatest</i> must be created. A database
+  user, also called <i>keatest</i> (that will be allowed to log in using password
+  <i>keatest</i>) must be created and given full privileges in that database. The
+  unit tests create the schema in the database before each test and delete it
+  afterwards.
+
+  PostgreSQL set up differs from system to system. Please consult your OS-specific
+  PostgreSQL documentation. The remainder of that section uses Ubuntu 13.10 x64 as
+  example. On Ubuntu, after installing PostgreSQL (with <tt>sudo apt-get install
+  postgresql</tt>), it is installed as user <i>postgres</i>. To create new databases
+  or add new users, initial commands must be issued as user postgres:
+
+@verbatim
+$ sudo -u postgres psql postgres
+[sudo] password for thomson:
+psql (9.1.12)
+Type "help" for help.
+postgres=# CREATE USER keatest WITH PASSWORD 'keatest';
+CREATE ROLE
+postgres=# CREATE DATABASE keatest;
+CREATE DATABASE
+postgres=# GRANT ALL PRIVILEGES ON DATABASE keatest TO keatest;
+GRANT
+postgres=# \q
+@endverbatim
+
+  Now we are back to our regular, unprivileged user. Try to log into the newly
+  created database using keatest credentials:
+@verbatim
+$ psql -d keatest -U keatest
+$ psql keatest -U keatest -W
+Password for user keatest:
+psql (9.1.12)
+Type "help" for help.
+
+keatest=>
+@endverbatim
+
+  If instead of seeing keatest=> prompt, your login will be refused with error
+  code about failed peer or indent authentication, it means that PostgreSQL is
+  configured to check unix username and reject login attepts if PostgreSQL names
+  are different. To alter that, PostgreSQL configuration must be changed.
+  Alternatively, you may set up your environment, so the tests would be run from
+  unix account keatest. <tt>/etc/postgresql/9.1/main/pg_hba.conf</tt> config file
+  had to betweaked. It may be in a different location in your system. The following
+  lines:
+
+@verbatim
+local   all             all                                     peer
+host    all             all             127.0.0.1/32            md5
+host    all             all             ::1/128                 md5
+@endverbatim
+
+  were replaced with:
+
+@verbatim
+local   all             all                                     password
+host    all             all             127.0.0.1/32            password
+host    all             all             ::1/128                 password
+@endverbatim
+
+  Please consult your PostgreSQL user manual before applying those changes as
+  those changes may expose your other databases that you run on the same system.
+  In general case, it is a poor idea to run anything of value on a system
+  that runs tests. Use caution!
+
+  The unit tests are run automatically when "make check" is executed (providing
+  that BIND 10 has been build with the \--with-dhcp-pgsql switch (see the installation
+  section in the <a href="http://bind10.isc.org/docs/bind10-guide.html">BIND10 Guide</a>).
+
   */

src/lib/dhcpsrv/dbaccess_parser.cc

@@ -67,7 +67,7 @@ DbAccessParser::build(isc::data::ConstElementPtr config_value) {
 
     // b. Check if the 'type; keyword known and throw an exception if not.
     string dbtype = type_ptr->second;
-    if ((dbtype != "memfile") && (dbtype != "mysql")) {
+    if ((dbtype != "memfile") && (dbtype != "mysql") && (dbtype != "postgresql")) {
         isc_throw(BadValue, "unknown backend database type: " << dbtype);
     }
 

src/lib/dhcpsrv/dhcpdb_create.pgsql

+-- Copyright (C) 2012-2013  Internet Systems Consortium.
+
+-- Permission to use, copy, modify, and distribute this software for any
+-- purpose with or without fee is hereby granted, provided that the above
+-- copyright notice and this permission notice appear in all copies.
+
+-- THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SYSTEMS CONSORTIUM
+-- DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+-- INTERNET SYSTEMS CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
+-- INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+-- FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+-- NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+-- WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+-- This is the BIND 10 DHCP schema specification for PostgreSQL.
+
+-- The schema is reasonably portable (with the exception of the engine
+-- specification, which is MySQL-specific).  Minor changes might be needed for
+-- other databases.
+
+-- To create the schema, either type the command:
+
+-- psql -U <user> -W <password> <database> < dhcpdb_create.pgsql
+
+-- ... at the command prompt, or log in to the PostgreSQL database and at the "postgres=#"
+-- prompt, issue the command:
+
+-- @dhcpdb_create.pgsql
+
+
+-- Holds the IPv4 leases.
+CREATE TABLE lease4 (
+    address BIGINT PRIMARY KEY NOT NULL,        -- IPv4 address
+    hwaddr BYTEA,                               -- Hardware address
+    client_id BYTEA,                            -- Client ID
+    valid_lifetime BIGINT,                      -- Length of the lease (seconds)
+    expire TIMESTAMP,                           -- Expiration time of the lease
+    subnet_id BIGINT                            -- Subnet identification
+    );
+
+
+-- Create search indexes for lease4 table
+-- index by hwaddr and subnet_id
+CREATE INDEX lease4_by_hwaddr_subnet_id ON lease4 (hwaddr, subnet_id);
+
+-- index by client_id and subnet_id
+CREATE INDEX lease4_by_client_id_subnet_id ON lease4 (client_id, subnet_id);
+
+-- Holds the IPv6 leases.
+-- N.B. The use of a VARCHAR for the address is temporary for development:
+-- it will eventually be replaced by BINARY(16).
+CREATE TABLE lease6 (
+    address VARCHAR(39) PRIMARY KEY NOT NULL,   -- IPv6 address
+    duid BYTEA,                                 -- DUID
+    valid_lifetime BIGINT,                      -- Length of the lease (seconds)
+    expire TIMESTAMP,                           -- Expiration time of the lease
+    subnet_id BIGINT,                           -- Subnet identification
+    pref_lifetime BIGINT,                       -- Preferred lifetime
+    lease_type SMALLINT,                        -- Lease type (see lease6_types
+                                                --    table for possible values)
+    iaid INT,                                   -- See Section 10 of RFC 3315
+    prefix_len SMALLINT                         -- For IA_PD only
+    );
+
+-- Create search indexes for lease4 table
+-- index by iaid, subnet_id, and duid
+CREATE INDEX lease6_by_iaid_subnet_id_duid ON lease6 (iaid, subnet_id, duid);
+
+-- ... and a definition of lease6 types.  This table is a convenience for
+-- users of the database - if they want to view the lease table and use the
+-- type names, they can join this table with the lease6 table
+CREATE TABLE lease6_types (
+    lease_type SMALLINT PRIMARY KEY NOT NULL,   -- Lease type code.
+    name VARCHAR(5)                             -- Name of the lease type
+    );
+START TRANSACTION;
+INSERT INTO lease6_types VALUES (0, 'IA_NA');   -- Non-temporary v6 addresses
+INSERT INTO lease6_types VALUES (1, 'IA_TA');   -- Temporary v6 addresses
+INSERT INTO lease6_types VALUES (2, 'IA_PD');   -- Prefix delegations
+COMMIT;
+
+-- Finally, the version of the schema.  We start at 0.1 during development.
+-- This table is only modified during schema upgrades.  For historical reasons
+-- (related to the names of the columns in the BIND 10 DNS database file), the
+-- first column is called "version" and not "major".
+
+-- NOTE: this MUST be kept in step with src/lib/dhcpsrv/tests/schema_copy.h,
+--       which defines the schema for the unit tests.  If you are updating
+--       the version number, the schema has changed: please ensure that
+--       schema_copy.h has been updated as well.
+CREATE TABLE schema_version (
+    version INT PRIMARY KEY NOT NULL,       -- Major version number
+    minor INT                               -- Minor version number
+    );
+START TRANSACTION;
+INSERT INTO schema_version VALUES (1, 0);
+COMMIT;
+
+-- Notes:
+
+-- Indexes
+-- =======
+-- It is likely that additional indexes will be needed.  However, the
+-- increase in lookup performance from these will come at the expense
+-- of a decrease in performance during insert operations due to the need
+-- to update the indexes.  For this reason, the need for additional indexes
+-- will be determined by experiment during performance tests.
+
+-- The most likely additional indexes will cover the following columns:
+
+-- expire
+-- To speed up the deletion of expired leases from the database.
+
+-- hwaddr and client_id
+-- For lease stability: if a client requests a new lease, try to find an
+-- existing or recently expired lease for it so that it can keep using the
+-- same IP address.
+
+-- Field Sizes
+-- ===========
+-- If any of the VARxxx field sizes are altered, the lengths in the MySQL
+-- backend source file (mysql_lease_mgr.cc) must be correspondingly changed.
+
+-- Portability
+-- ===========
+-- Some columns contain binary data so are stored as BYTEA instead of
+-- VARCHAR.  This may be non-portable between databases: in this case, the
+-- definition should be changed to VARCHAR.

src/lib/dhcpsrv/dhcpsrv_messages.mes

@@ -375,6 +375,83 @@ lease from the MySQL database for the specified address.
 A debug message issued when the server is attempting to update IPv6
 lease from the MySQL database for the specified address.
 
+% DHCPSRV_PGSQL_ADD_ADDR4 adding IPv4 lease with address %1
+A debug message issued when the server is about to add an IPv4 lease
+with the specified address to the PostgreSQL backend database.
+
+% DHCPSRV_PGSQL_ADD_ADDR6 adding IPv6 lease with address %1
+A debug message issued when the server is about to add an IPv6 lease
+with the specified address to the PostgreSQL backend database.
+
+% DHCPSRV_PGSQL_COMMIT committing to MySQL database
+The code has issued a commit call.  All outstanding transactions will be
+committed to the database.  Note that depending on the PostgreSQL settings,
+the committal may not include a write to disk.
+
+% DHCPSRV_PGSQL_DB opening PostgreSQL lease database: %1
+This informational message is logged when a DHCP server (either V4 or
+V6) is about to open a PostgreSQL lease database.  The parameters of the
+connection including database name and username needed to access it
+(but not the password if any) are logged.
+
+% DHCPSRV_PGSQL_DELETE_ADDR deleting lease for address %1
+A debug message issued when the server is attempting to delete a lease for
+the specified address from the PostgreSQL database for the specified address.
+
+% DHCPSRV_PGSQL_GET_ADDR4 obtaining IPv4 lease for address %1
+A debug message issued when the server is attempting to obtain an IPv4
+lease from the PostgreSQL database for the specified address.
+
+% DHCPSRV_PGSQL_GET_ADDR6 obtaining IPv6 lease for address %1 (lease type %2)
+A debug message issued when the server is attempting to obtain an IPv6
+lease from the PostgreSQL database for the specified address.
+
+% DHCPSRV_PGSQL_GET_CLIENTID obtaining IPv4 leases for client ID %1
+A debug message issued when the server is attempting to obtain a set
+of IPv4 leases from the PostgreSQL database for a client with the specified
+client identification.
+
+% DHCPSRV_PGSQL_GET_HWADDR obtaining IPv4 leases for hardware address %1
+A debug message issued when the server is attempting to obtain a set
+of IPv4 leases from the PostgreSQL database for a client with the specified
+hardware address.
+
+% DHCPSRV_PGSQL_GET_IAID_DUID obtaining IPv4 leases for IAID %1 and DUID %2, lease type %3
+A debug message issued when the server is attempting to obtain a set of
+IPv6 lease from the PostgreSQL database for a client with the specified IAID
+(Identity Association ID) and DUID (DHCP Unique Identifier).
+
+% DHCPSRV_PGSQL_GET_IAID_SUBID_DUID obtaining IPv4 leases for IAID %1, Subnet ID %2 and DUID %3
+A debug message issued when the server is attempting to obtain an IPv6
+lease from the PostgreSQL database for a client with the specified IAID
+(Identity Association ID), Subnet ID and DUID (DHCP Unique Identifier).
+
+% DHCPSRV_PGSQL_GET_SUBID_CLIENTID obtaining IPv4 lease for subnet ID %1 and client ID %2
+A debug message issued when the server is attempting to obtain an IPv4
+lease from the PostgreSQL database for a client with the specified subnet ID
+and client ID.
+
+% DHCPSRV_PGSQL_GET_SUBID_HWADDR obtaining IPv4 lease for subnet ID %1 and hardware address %2
+A debug message issued when the server is attempting to obtain an IPv4
+lease from the PostgreSQL database for a client with the specified subnet ID
+and hardware address.
+
+% DHCPSRV_PGSQL_GET_VERSION obtaining schema version information
+A debug message issued when the server is about to obtain schema version
+information from the PostgreSQL database.
+
+% DHCPSRV_PGSQL_ROLLBACK rolling back PostgreSQL database
+The code has issued a rollback call.  All outstanding transaction will
+be rolled back and not committed to the database.
+
+% DHCPSRV_PGSQL_UPDATE_ADDR4 updating IPv4 lease for address %1
+A debug message issued when the server is attempting to update IPv4
+lease from the PostgreSQL database for the specified address.
+
+% DHCPSRV_PGSQL_UPDATE_ADDR6 updating IPv6 lease for address %1
+A debug message issued when the server is attempting to update IPv6
+lease from the PostgreSQL database for the specified address.
+
 % DHCPSRV_NOTYPE_DB no 'type' keyword to determine database backend: %1
 This is an error message, logged when an attempt has been made to access
 a database backend, but where no 'type' keyword has been included in

src/lib/dhcpsrv/lease_mgr_factory.cc

@@ -20,6 +20,9 @@
 #ifdef HAVE_MYSQL
 #include <dhcpsrv/mysql_lease_mgr.h>
 #endif
+#ifdef HAVE_PGSQL
+#include <dhcpsrv/pgsql_lease_mgr.h>
+#endif
 
 #include <boost/algorithm/string.hpp>
 #include <boost/foreach.hpp>
@@ -124,6 +127,13 @@ LeaseMgrFactory::create(const std::string& dbaccess) {
         getLeaseMgrPtr().reset(new MySqlLeaseMgr(parameters));
         return;
     }
+#endif
+#ifdef HAVE_PGSQL
+    if (parameters[type] == string("postgresql")) {
+        LOG_INFO(dhcpsrv_logger, DHCPSRV_PGSQL_DB).arg(redacted);
+        getLeaseMgrPtr().reset(new PgSqlLeaseMgr(parameters));
+        return;
+    }
 #endif
     if (parameters[type] == string("memfile")) {
         LOG_INFO(dhcpsrv_logger, DHCPSRV_MEMFILE_DB).arg(redacted);

src/lib/dhcpsrv/pgsql_lease_mgr.h

+// Copyright (C) 2013-2014 Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef PGSQL_LEASE_MGR_H
+#define PGSQL_LEASE_MGR_H
+
+#include <dhcp/hwaddr.h>
+#include <dhcpsrv/lease_mgr.h>
+
+#include <boost/scoped_ptr.hpp>
+#include <boost/utility.hpp>
+#include <libpq-fe.h>
+
+namespace isc {
+namespace dhcp {
+
+struct PgSqlParam {
+    std::string value;
+    int isbinary;
+    int binarylen;
+};
+
+typedef std::vector<PgSqlParam> bindparams;
+
+struct PgSqlStatementBind {
+    const char * stmt_name;
+    int stmt_nbparams;
+};
+
+class PgSqlLease4Exchange;
+class PgSqlLease6Exchange;
+
+const uint32_t PG_CURRENT_VERSION = 1;
+const uint32_t PG_CURRENT_MINOR = 0;
+
+class PgSqlLeaseMgr : public LeaseMgr {
+public:
+    PgSqlLeaseMgr(const ParameterMap& parameters);
+    virtual ~PgSqlLeaseMgr();
+    virtual bool addLease(const Lease4Ptr& lease);
+    virtual bool addLease(const Lease6Ptr& lease);
+
+    virtual Lease4Ptr getLease4(const isc::asiolink::IOAddress& addr) const;
+    virtual Lease4Collection getLease4(const isc::dhcp::HWAddr& hwaddr) const;
+    virtual Lease4Ptr getLease4(const isc::dhcp::HWAddr& hwaddr,
+                                SubnetID subnet_id) const;
+    virtual Lease4Collection getLease4(const ClientId& clientid) const;
+    virtual Lease4Ptr getLease4(const ClientId& client_id, const HWAddr& hwaddr,
+                                SubnetID subnet_id) const;
+    virtual Lease4Ptr getLease4(const ClientId& clientid,
+                                SubnetID subnet_id) const;
+
+    virtual Lease6Ptr getLease6(Lease::Type type,
+                                const isc::asiolink::IOAddress& addr) const;
+    virtual Lease6Collection getLeases6(Lease::Type type, const DUID& duid,
+                                       uint32_t iaid) const;
+    virtual Lease6Collection getLeases6(Lease::Type type, const DUID& duid,
+                                        uint32_t iaid, SubnetID subnet_id) const;
+
+    virtual void updateLease4(const Lease4Ptr& lease4);
+    virtual void updateLease6(const Lease6Ptr& lease6);
+    virtual bool deleteLease(const isc::asiolink::IOAddress& addr);
+    virtual std::string getType() const {
+        return (std::string("postgresql"));
+    }
+    virtual std::string getName() const;
+    virtual std::string getDescription() const;
+    virtual std::pair<uint32_t, uint32_t> getVersion() const;
+    virtual void commit();
+    virtual void rollback();
+    enum StatementIndex {
+        DELETE_LEASE4,              // Delete from lease4 by address
+        DELETE_LEASE6,              // Delete from lease6 by address
+        GET_LEASE4_ADDR,            // Get lease4 by address
+        GET_LEASE4_CLIENTID,        // Get lease4 by client ID
+        GET_LEASE4_CLIENTID_SUBID,  // Get lease4 by client ID & subnet ID
+        GET_LEASE4_HWADDR,          // Get lease4 by HW address
+        GET_LEASE4_HWADDR_SUBID,    // Get lease4 by HW address & subnet ID
+        GET_LEASE6_ADDR,            // Get lease6 by address
+        GET_LEASE6_DUID_IAID,       // Get lease6 by DUID and IAID
+        GET_LEASE6_DUID_IAID_SUBID, // Get lease6 by DUID, IAID and subnet ID
+        GET_VERSION,                // Obtain version number
+        INSERT_LEASE4,              // Add entry to lease4 table
+        INSERT_LEASE6,              // Add entry to lease6 table
+        UPDATE_LEASE4,              // Update a Lease4 entry
+        UPDATE_LEASE6,              // Update a Lease6 entry
+        NUM_STATEMENTS              // Number of statements
+    };
+private:
+    void prepareStatements();
+    void openDatabase();
+    bool addLeaseCommon(StatementIndex stindex, bindparams & params);
+    template <typename Exchange, typename LeaseCollection>
+    void getLeaseCollection(StatementIndex stindex, bindparams & params,
+                            Exchange& exchange, LeaseCollection& result,
+                            bool single = false) const;
+    void getLeaseCollection(StatementIndex stindex, bindparams & params,
+                            Lease4Collection& result) const {
+        getLeaseCollection(stindex, params, exchange4_, result);
+    }
+    void getLeaseCollection(StatementIndex stindex, bindparams & params,
+                            Lease6Collection& result) const {
+        getLeaseCollection(stindex, params, exchange6_, result);
+    }
+    inline void checkError(PGresult * r, StatementIndex index,
+                           const char* what) const {
+        int s = PQresultStatus(r);
+        if (s != PGRES_COMMAND_OK && s != PGRES_TUPLES_OK) {
+            PQclear(r);
+
+            isc_throw(DbOperationError, what << " for <" <<
+                      statements_[index].stmt_name << ">, " <<
+                      PQerrorMessage(status));
+        }
+    }
+    inline void convertToQuery(bindparams & params,
+                               std::vector<const char *>& params_,
+                               std::vector<int>& lengths_,
+                               std::vector<int>& formats_) const {
+        params_.reserve(params.size());
+        lengths_.reserve(params.size());
+        formats_.reserve(params.size());
+
+        for(bindparams::const_iterator it = params.begin(); it != params.end();
+                ++ it) {
+            params_.push_back((* it).value.c_str());
+            lengths_.push_back((* it).binarylen);
+            formats_.push_back((* it).isbinary);
+        }
+    }
+    void getLease(StatementIndex stindex, bindparams & params,
+                  Lease4Ptr& result) const;
+    void getLease(StatementIndex stindex, bindparams & params,
+                  Lease6Ptr& result) const;
+    template <typename LeasePtr>
+    void updateLeaseCommon(StatementIndex stindex, bindparams & params,
+                           const LeasePtr& lease);
+    bool deleteLeaseCommon(StatementIndex stindex, bindparams & params);
+
+    boost::scoped_ptr<PgSqlLease4Exchange> exchange4_;
+    boost::scoped_ptr<PgSqlLease6Exchange> exchange6_;
+    std::vector<PgSqlStatementBind> statements_;
+    PGconn * status;
+};
+
+}; // end of isc::dhcp namespace
+}; // end of isc namespace
+
+#endif // PGSQL_LEASE_MGR_H

src/lib/dhcpsrv/tests/Makefile.am

@@ -67,8 +67,12 @@ libdhcpsrv_unittests_SOURCES += dhcp_parsers_unittest.cc
 if HAVE_MYSQL
 libdhcpsrv_unittests_SOURCES += mysql_lease_mgr_unittest.cc
 endif
+if HAVE_PGSQL
+libdhcpsrv_unittests_SOURCES += pgsql_lease_mgr_unittest.cc
+endif
 libdhcpsrv_unittests_SOURCES += pool_unittest.cc
-libdhcpsrv_unittests_SOURCES += schema_copy.h